<template>
  <div class="number-container d-flex justify-content-center align-items-center">
    <!-- 减 1 的按钮 -->
    <button type="button" class="btn btn-light btn-sm" @click="min">-</button>
    <!-- 购买的数量 -->
    <span class="number-box">{{ count }}</span>
    <!-- 加 1 的按钮 -->
    <button type="button" class="btn btn-light btn-sm" @click="add">+</button>
  </div>
</template>

<script>
import bus from '@/components/eventBus.js'
export default {
  props:{
    // 商品的数量
    count:{
      default:0,
      type:Number
    },
    //接收Goods的id
    id:{
      type:Number,
      required:true
    }
  },
  methods:{
    // 商品数量+1
    add(){
      const obj = {id:this.id,value:this.count + 1}
      console.log(obj);
      bus.$emit('share',obj)
    },
    //商品数量-1
    min(){
      if(this.count-1 ===0) return
      const obj = {id:this.id,value:this.count - 1}
      console.log(obj)
      bus.$emit('share',obj)
    }
  }
}
</script>

<style lang="less" scoped>
.number-box {
  min-width: 30px;
  text-align: center;
  margin: 0 5px;
  font-size: 12px;
}

.btn-sm {
  width: 30px;
}
</style>
